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Engines and Components› Pistons and Piston Rings

KB PERFORMANCE PISTONS

BBM Flat Top Piston Set 4.360 Bore -5cc

$651.97 $455.40 Save $196.57

SKU: K02K KB237.040

In Stock
In Stock
Ships by Sep 12
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$100 Minimum Order
Non-Returnable Item
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Overview

The KB Performance Pistons KB237.040 is a set of eight hypereutectic aluminum pistons designed for high-performance applications. They feature a flat top with two valve reliefs and a 4.360-inch bore. These pistons are made from 390 aluminum alloy, heat-treated to T6 standards for increased strength.

Key features include 100 percent CNC-machined crowns, a high upper compression-ring location, gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves. The rigid-rib skirt design provides stability, improved oil control, and reduced blow-by.
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Part #: KB237.040

Piston - KB Series - Hypereutectic - 4.360 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 5.00 cc - Mopar RB-Series - Set of 8

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandKB PERFORMANCE PISTONS
Part NumberK02K KB237.040

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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